Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '70e8bdbf6f00756c581f6af306cc5728e6930cf0c247195be1380d2463c0fbdc' 
  AND token = 'bvVBhb6oe9uVxH6LxxKQS2pzZB66ASfCF52pxnftsMQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}